Scientific Calculator

Scientific Calculator

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Free Online Scientific Calculator

Our free online scientific calculator provides all the advanced mathematical functions you need for algebra, trigonometry, calculus, and engineering work — directly in your browser. No software installation, no account, and no cost.

Available Functions

  • Trigonometry: sin, cos, tan (input in radians)
  • Logarithms: log (base 10), ln (natural logarithm)
  • Powers and Roots: x², xʸ (any exponent), √ (square root)
  • Constants: π (pi ≈ 3.14159), e (Euler's number ≈ 2.71828)
  • Grouping: parentheses for order-of-operations control

Who Uses a Scientific Calculator?

Scientific calculators are essential tools for students in middle school through university, professional engineers, physicists, architects, and data scientists. Trigonometric functions are critical for geometry and wave analysis. Logarithms appear in pH calculations, decibel levels, and earthquake magnitude scales. Power functions underpin compound interest and exponential growth models.

Understanding Trigonometric Inputs

This calculator uses radians as the angle unit, consistent with standard mathematical and programming conventions. To convert degrees to radians, multiply by π/180. For example, sin(90°) = sin(π/2) = 1. Enter Math.PI/2 using the π button and division to get this value.

Order of Operations

The calculator respects standard mathematical order of operations (PEMDAS/BODMAS). Use parentheses liberally to make complex expressions unambiguous. For example, to compute sin(30°) correctly in radians: sin(π/6) — use the sin button then π÷6 then close the parenthesis.

Tips for Accurate Results

  • Always close every open parenthesis before pressing =.
  • Use the ⌫ (backspace) button to correct the last character.
  • For very precise work, note that results are rounded to 10 decimal places.
  • The e constant is Euler's number (≈2.718), not scientific notation — use it in expressions like e^x via the xʸ button.

Frequently Asked Questions

Does this calculator use degrees or radians?
It uses radians for all trigonometric functions, which is the standard in mathematics and programming. To convert: radians = degrees × (π ÷ 180).
How do I calculate x to the power of y?
Enter the base number, press the xʸ button (which inserts the ^ symbol), then enter the exponent and press =. For example, 2^10 gives 1024.
What is the difference between log and ln?
log (or log₁₀) is the common logarithm with base 10. ln is the natural logarithm with base e (≈2.718). In science, ln is used for exponential growth and decay; log₁₀ is used for pH and decibels.
Why does it show an error?
Errors occur when the expression is incomplete (unclosed parentheses), mathematically undefined (like log of a negative number), or contains disallowed characters for security. Press C and start over.
Is this calculator safe to use?
Yes. The calculator validates all input against a strict allowlist of mathematical functions before evaluating. Only Math.* functions, numbers, and operators are permitted — no arbitrary code can execute.